对于我的菜单，我最好使用选项卡而不是下拉菜单。
我使用了 W3Schools 示例来尝试让每个选项卡在失去焦点时关闭，但我找不到任何方法可以做到这一点。这是他们的示例（根据他们的条款和条件允许）。我了解如何将其转换为 PC/智能手机响应式（包括汉堡菜单），并将通过数据库驱动的 PHP/SQL 填充菜单。
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {font-family: Arial;}
/* Style the tab */
.tab {
overflow: hidden;
border: 1px solid #ccc;
background-color: #f1f1f1;
}
/* Style the buttons inside the tab */
.tab button {
background-color: inherit;
float: left;
border: none;
outline: none;
cursor: pointer;
padding: 14px 16px;
transition: 0.3s;
font-size: 17px;
}
/* Change background color of buttons on hover */
.tab button:hover {
background-color: #ddd;
}
/* Create an active/current tablink class */
.tab button.active {
background-color: #ccc;
}
/* Style the tab content */
.tabcontent {
display: none;
padding: 6px 12px;
border: 1px solid #ccc;
border-top: none;
}
/* Style the close button */
.topright {
float: right;
cursor: pointer;
font-size: 28px;
}
.topright:hover {color: red;}
</style>
</head>
<body>
<h2>Tabs</h2>
<p>Click on the x button in the top right corner to close the current tab:</p>
<div class="tab">
<button class="tablinks" onclick="openCity(event, 'London')" id="defaultOpen">London</button>
<button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button>
<button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button>
</div>
<div id="London" class="tabcontent">
<span onclick="this.parentElement.style.display='none'" class="topright">×</span>
<h3>London</h3>
<p>London is the capital city of England.</p>
</div>
<div id="Paris" class="tabcontent">
<span onclick="this.parentElement.style.display='none'" class="topright">×</span>
<h3>Paris</h3>
<p>Paris is the capital of France.</p>
</div>
<div id="Tokyo" class="tabcontent">
<span onclick="this.parentElement.style.display='none'" class="topright">×</span>
<h3>Tokyo</h3>
<p>Tokyo is the capital of Japan.</p>
</div>
<script>
function openCity(evt, cityName) {
var i, tabcontent, tablinks;
tabcontent = document.getElementsByClassName("tabcontent");
for (i = 0; i < tabcontent.length; i++) {
tabcontent[i].style.display = "none";
}
tablinks = document.getElementsByClassName("tablinks");
for (i = 0; i < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
document.getElementById(cityName).style.display = "block";
evt.currentTarget.className += " active";
}
// Get the element with id="defaultOpen" and click on it
document.getElementById("defaultOpen").click();
</script>
</body>
</html>
我试过了
<div id="London" class="tabcontent" onblur="style.display.visibility='none'">Lorem Ipsum....</div>
对于每个选项卡和许多类似的示例，但没有任何效果。
我尝试了几种监听 onclick 等的方法，如所述，但我无法让任何方法工作。
你知道吗 div 不能像正常输入那样获得焦点或模糊，但是你可以添加一个 prop tabindex 然后它可以获得焦点，所以我在下面添加了一些代码，当选项卡更改时活动内容将获得焦点，而当内容模糊时它将被隐藏
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
font-family: Arial;
}
/* Style the tab */
.tab {
overflow: hidden;
border: 1px solid #ccc;
background-color: #f1f1f1;
}
/* Style the buttons inside the tab */
.tab button {
background-color: inherit;
float: left;
border: none;
outline: none;
cursor: pointer;
padding: 14px 16px;
transition: 0.3s;
font-size: 17px;
}
/* Change background color of buttons on hover */
.tab button:hover {
background-color: #ddd;
}
/* Create an active/current tablink class */
.tab button.active {
background-color: #ccc;
}
/* Style the tab content */
.tabcontent {
display: none;
padding: 6px 12px;
border: 1px solid #ccc;
border-top: none;
outline: 0;
}
/* Style the close button */
.topright {
float: right;
cursor: pointer;
font-size: 28px;
}
.topright:hover {
color: red;
}
</style>
</head>
<body>
<h2>Tabs</h2>
<p>Click on the x button in the top right corner to close the current tab:</p>
<div class="tab">
<button class="tablinks" onclick="openCity(event, 'London')" id="defaultOpen">London</button>
<button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button>
<button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button>
</div>
<div id="London" class="tabcontent" tabindex="0" onblur="event.target.style.display='none'">
<span onclick="this.parentElement.style.display='none'" class="topright">×</span>
<h3>London</h3>
<p>London is the capital city of England.</p>
</div>
<div id="Paris" class="tabcontent" tabindex="1" onblur="event.target.style.display='none'">
<span onclick="this.parentElement.style.display='none'" class="topright">×</span>
<h3>Paris</h3>
<p>Paris is the capital of France.</p>
</div>
<div id="Tokyo" class="tabcontent" tabindex="2" onblur="event.target.style.display='none'">
<span onclick="this.parentElement.style.display='none'" class="topright">×</span>
<h3>Tokyo</h3>
<p>Tokyo is the capital of Japan.</p>
</div>
<script>
function openCity(evt, cityName) {
var i, tabcontent, tablinks;
tabcontent = document.getElementsByClassName("tabcontent");
for (i = 0; i < tabcontent.length; i++) {
tabcontent[i].style.display = "none";
}
tablinks = document.getElementsByClassName("tablinks");
for (i = 0; i < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
document.getElementById(cityName).style.display = "block";
document.getElementById(cityName).focus() // add focus when tab change
evt.currentTarget.className += " active";
}
// Get the element with id="defaultOpen" and click on it
document.getElementById("defaultOpen").click();
</script>
</body>
</html>